class_docstr: Elasticsearch driver for image-match
  
      
code: def insert_single_record(self, rec, refresh_after=False):
      rec["timestamp"] = datetime.now()
      self.es.index(
          index=self.index,
          body={self.doc_type: rec},
          refresh=refresh_after,
      )
  
file_path: image-match/image_match/elasticsearch_driver.py
imports: from .signature_database_base import SignatureDatabaseBase
  from .signature_database_base import normalized_distance
  from datetime import datetime
  import numpy
  from collections import deque
label_desc: Use image node_id 3 for calling the SignatureES obj's underlying member method code with example usage: obj.insert_single_record(rec, refresh_after) without return types